A train moves past a post and a platform 264 m long in 8 seconds and 20 seconds respectively. What is the speed of the train?
A train overtakes two persons who are walking in the same direction to that of the train at 2 kmph and 4 kmph and passes them completely in 9 and 10 seconds respectively. What is the length of the train?
A train runs at the speed of 72 kmph and crosses a 250 m long platform in 26 seconds. What is the length of the train?
A train is traveling at 48 kmph . It crosses another train having half of its length , traveling in opposite direction at 42 kmph, in 12 seconds. It also passes a railway platform in 45 seconds. What is the length of the platform?
Let the length of the train traveling at 48 kmph be 2x meters.
And length of the platform is y meters.
Relative speed of train = (48+42) kmph
= (90*5/18) = 25 m/sec;
And 48 kmph = 48*5/18 = 40/3 m/sec.
According to the question,
(2x +x)/25 = 12;
Or, 3x = 12*25 = 300;
Or, x = 300/3 = 100m
Then, length of the train = 2x = 100*2 = 200m.
200+y/(40/3) = 45;
600+3y = 40*45;
Or, 3y = 1800-600 = 1200;
Or, y = 1200/3 = 400 m.
Length of the platform = 400 m.
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